Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3b86df2d36bfc8…

MALICIOUS

PDF

41.8 KB Created: 2020-10-15 07:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 522411ed9f2a6f6a4dee6e85ecc59d01 SHA-1: 713bf1cd0f1f56e7c8e003e5e527d0b1119ed839 SHA-256: 7a3b86df2d36bfc80f27acc777cbdcbcab0353dfe7dd53d75705d112ba78c23c
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=dead+paradise+the+road+warrior+apkpure In PDF document text
    • https://site-1038856.mozfiles.com/files/1038856/makuz.pdfIn PDF document text
    • https://site-1038599.mozfiles.com/files/1038599/83145317524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87701b8d15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f87bc4732756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8746316b939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8747674a9be.pdfIn PDF document text
    • https://site-1040248.mozfiles.com/files/1040248/kuvibox.pdfIn PDF document text
    • https://site-1043689.mozfiles.com/files/1043689/fozanavekuborixid.pdfIn PDF document text
    • https://site-1043767.mozfiles.com/files/1043767/38256469302.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/xegonada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f87ca2fb8608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87afd5ee9d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05faf017-66f6-44a5-8a7e-12c4c2b97855/95919105899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a52693-7ad2-4b1b-9f6b-0c8391bc53a9/97665257231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07cd256-f3f3-4da7-878a-3ff8ad182611/podubaxaxezut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab278ad-dd22-4522-b3b8-af4f1a07bc6f/62821512718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bf877b-a3db-426e-af95-f42c48a06d50/vatewurebagokuvunav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a3ed7b-f52c-49ff-b621-3a111e60d205/fedepufowuxidomow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2bda53-82b9-42e9-9d25-97ccd0b107b2/bimebebelibamud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 5172 bytes
SHA-256: facdf22a26b5e3944429d78bdfa3d815e28e444bd30cf5e24e3a3d8c95636579
font_01_sfnt_off0000769e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769E 10348 bytes
SHA-256: 31cee99f64a76c760597f610a275457a8e97cf0ef1451eb58536314f4ae88a1f

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